But it is not just the big campaign groups that have benefited. Once the preserve of students, tree huggers and political dissidents, activism is now the opium of suburban housewives and white collar workers across the world. It is particularly evident in the huge popularity of online petition sites:

A UK member of parliament recently told me she receives dozens of emails every day supporting various causes from the 3 million+ members of 38 Degrees, all of which she feels compelled to respond to.

People power has never felt so real, or so daunting. And in an age in which business is increasingly expected to play the role of a concerned and actively engaged ‘citizen’, the numbers involved and the sheer unpredictability of public opinion raises real challenges and risks, as firmssupporting ostensibly mainstreamcauses have discovered.

Drawing on discussions and interviews with Greenpeace, the WWF and high profile individual activists, I argue in my book Managing Online Reputation that online activism is now mainstream, activist networks are becoming more amorphous, and campaign groups are deliberately making their lines of attack less predictable, before going on to detail three current and emerging strategies and tactics used online in the ongoing battle for public support.

The relevant chapter – on the social and environmental threats of the web – is now available online as a free sample:

With propaganda swirling online, a Change.org petition fast escalating and Greenpeace all over your Facebook page, an online activist attack can feel terrifying and remorseless. But while some activist campaigns meet or even exceed their objectives, most fail to convince the public of their merits, or simply succumb to slacktivism.

How you choose to respond requires a close understanding of your detractors’ playbook, a smart reading of the public mood, and an appreciation of your tolerance for business and reputational risk.